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Professional Paper 223
Professional Paper 359
Bates Hunter Mine Report
The Patty Report
Inventory Report
Professional Paper 94
Shotwell Report,
March 1934
43-101
Technical Report
Location of Clay County Mine
The Clay Economic Appraisal, 1979
The Clay History
The Clay Geologic Evaluation, 1981
The Culber Report, 1986
The Clay Evaluation, 1981
Clay Feasibility Study, September 1983
Clay Feasibility Study, June 1984